20372620 has 24 divisors (see below), whose sum is σ = 43694784. Its totient is φ = 7975296.

The previous prime is 20372591. The next prime is 20372659. The reversal of 20372620 is 2627302.

It is a junction number, because it is equal to n+sod(n) for n = 20372591 and 20372600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9897 + ... + 11776.

It is an arithmetic number, because the mean of its divisors is an integer number (1820616).

Almost surely, 2^20372620 is an apocalyptic number.

20372620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20372620 is an abundant number, since it is smaller than the sum of its proper divisors (23322164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20372620 is a wasteful number, since it uses less digits than its factorization.

20372620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21729 (or 21727 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20372620 is about 4513.6038816006. The cubic root of 20372620 is about 273.1171434815.

Adding to 20372620 its reverse (2627302), we get a palindrome (22999922).

The spelling of 20372620 in words is "twenty million, three hundred seventy-two thousand, six hundred twenty".